Fig. 4From: Prophylactic cranial irradiation (PCI) versus active surveillance in patients with limited-stage small cell lung cancer: a retrospective, multicentre studyExploratory subgroup analysis of OS. PCI prophylactic cranial irradiation, HR hazard ratio, ECOG PS Eastern Cooperative Oncology Group performance status, CRT chemoradiotherapy, CR complete response, PR partial responseBack to article page